請問wordpress適合在CentOS系統下安裝嗎？

在http://tw.wordpress.org/網站上,很少有wordpress安裝問題,可是我在CentOS系統下安裝wordpress卻有不少安裝問題,目前安裝wordpress的環境以建立好,只剩http://localhost/wordpress啟動安裝了,出現的錯誤訊息是：
Warning: require(/var/www/html/wordpress/wp-includes/load.php): failed to open stream: Permission denied in /var/www/html/wordpress/wp-settings.php on line 21 Fatal error: require(): Failed opening required ‘/var/www/html/wordpress/wp-includes/load.php’ (include_path=’.:/usr/share/pear:/usr/share/php’) in /var/www/html/wordpress/wp-settings.php on line 21
請php高手指點修正,感激不盡！